Pursuant to Rule 497(e) under the
Securities Act of 1933, as amended, (the 1933 Act) submitted electronically
via the EDGAR system, please find enclosed certain risk/return summary
information in an interactive data format using the eXtensible Business
Reporting Language (the XBRL exhibits). The XBRL exhibits reflect the
Item 3 risk/return summary disclosure that was included in the supplement
relating to the prospectus dated December 28, 2012, for Delaware National
High-Yield Municipal Bond Fund, a series of the Registrant, that was filed with
the U.S. Securities and Exchange Commission via the EDGAR system on November 1,
2013 (Accession No. 0001206774-13-003932) pursuant to Rule 497(e) under the 1933
Act.

If you have any questions or
comments regarding this filing, please call me at (215) 564-8099.